(CNN) - If the recent CNN/Western Republican Presidential Debate in Las Vegas was any indication, the coming months on the campaign trail are likely to be nasty between Mitt Romney and Rick Perry.

After a shouting match between the two at the debate, Romney - the former governor of Massachusetts - responded, "Rick, again, Rick, again, I'm speaking. ... This has been a tough couple of debates for Rick, and I understand that. And so you're going to get testy."

Washington (CNN) - President Barack Obama on Thursday called the death of former Libyan leader Moammar Gadhafi both the end of a "long and painful chapter for the people of Libya" and the hallmark of a successful U.S. foreign policy.

In the first official government remarks on the killing of a longtime foe who was behind terrorist attacks against U.S. citizens, Obama pledged his government's support as Libya builds a democratic system from the ruins of dictatorship.

Plymouth, New Hampshire (CNN) - Vice President Joe Biden lauded NATO for its role in tracking down ousted Libyan leader Moammar Gadhafi, but said he could not confirm whether the dictator had been killed or captured.

"NATO got it right and guess what? Libya, Gadhafi, one way or another is gone," Biden said Thursday during a question and answer period after a jobs speech in Plymouth, New Hampshire. "Whether he is alive or dead he is gone."FULL POST

(CNN) - Mitt Romney was the first candidate to respond to Libyan leader Moammar Gadhafi's death Thursday, saying the world is a better place with the longtime leader gone.

"I think it's about time Gadhafi, a terrible tyrant that killed his own people and murdered Americans and others in the traged in Lockerbie," Romney said after a town hall in Iowa. "The world is a better place with Gadhafi gone."FULL POST

(CNN) - Secretary of State Hillary Clinton took a moment Thursday in a meeting with Afghan Pres. Hamid Karzai to tell Afghan leaders about American presidential candidate Herman Cain.

Also in the meeting were U.S. Ambassador to Afghanistan Ryan Crocker, Senior Deputy Special Representative for Afghanistan and Pakistan Frank Ruggiero, and Gen. John Allen, commander of NATO's International Security Assistance Force.